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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Cash flows from operating activities:    
Net income (loss) $ 2,493 $ (1,297)
Adjustments to reconcile net income (loss) from operations to net cash provided by operating activities:    
Depreciation 5,344 6,006
Stock-based compensation expense 1,084 1,695
Bad debt expense 88 0
Gain from disposal of assets (301) (1,002)
Income from equity investment in joint venture (1,162) (1,466)
Cash settlements from natural gas derivatives, net (359) 0
Realized and unrealized losses on natural gas derivatives, net 123 540
Distributions from equity investment in joint venture 1,716 813
Changes in operating assets and liabilities:    
Accounts receivable 1,845 5,636
Prepaid expenses and other current assets 857 948
Accounts payable and accrued liabilities (155) (6,633)
Other (51) 140
Net cash provided by operating activities 11,522 5,380
Cash flows from investing activities:    
Acquisition of fixed assets (3,561) (8,982)
Proceeds from sale of assets 381 0
Net cash used in investing activities (3,180) (8,982)
Cash flows from financing activities:    
Payments on short- and long-term notes payable (1,280) (860)
Payments on notes payable from related parties 0 (1,813)
Payment of debt issuance costs 0 (108)
Employee tax payments from restricted stock withholdings (9) (162)
Net cash used in financing activities (1,289) (2,943)
Effect of exchange rate changes on cash (34) 8
Net increase (decrease) in cash and cash equivalents 7,019 (6,537)
Cash and cash equivalents, beginning of period 5,374 11,451
Cash and cash equivalents, end of period $ 12,393 $ 4,914